Chenango County Multi-Jurisdictional All-Hazard Mitigation Plan - - PDF document

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Presented by Tetra Tech EM Inc.

Multi-Jurisdictional All-Hazard Mitigation Plan Support for Chenango County

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DMA 2000 Purpose & Requirements

The Disaster Mitigation Act of 2000 (DMA 2000)

– Amends Stafford Act – Establishes a national program for pre-disaster hazard

mitigation

Formalizes State administration of Hazard Mitigation

Grant Program for Qualifying States

Streamlines and controls federal costs associated

with disaster assistance and management costs for grant administration

Requires State and Local All-Hazard Mitigation Plans

as a condition of pre-disaster mitigation funding

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Chenango County & DMA 2000

The mitigation plan will:

– Help Chenango County prepare for and mitigate the effects of

disasters

– Make county eligible for federal funds for pre-disaster mitigation

planning

– Help county achieve compliance with federal law

A Local Mitigation Plan demonstrates the jurisdiction’s commitment to reducing risk and serves as a guide for decision makers as they commit resources to minimize the effects of natural hazards.

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Requirements for Local Mitigation Plans

Be prepared by November 1, 2004 Include the opportunity for public comment and for relevant agency

and stakeholder involvement

Risk Assessment - a factual basis for activities proposed in the

Mitigation Strategy section include:

–

Overview of hazards (type, location, probability)

–

Vulnerability analysis (impact on buildings, infrastructure, economy, development trends)

–

Multiple jurisdictions (specific to each town/village/city)

Mitigation Strategy – a blueprint for reducing losses identified in the

risk assessment

Plan Maintenance and Adoption Processes 1/24/20075

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Mitigation Planning and HAZUS-MH

HAZUS-MH Applied to Conduct Risk Assessment Using Four Risk Assessment Steps

Phase 2: Assess Risks Phase 1: Organize Resources Phase 3: Develop the Mitigation Plan Phase 4: Implement the Plan and Monitor Progress Results from HAZUS-MH

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Risk Assessment Using HAZUS-MH

HAZUS-MH Outputs Base map, list of hazards

• f concern

Risk Assessment Steps Table of hazard profile data, map of hazard areas, list of priority hazards

Step 2: Profile Hazard Events Step 1: Identify Hazards Step 3: Inventory Assets

Tables and maps of inventory data

Step 4: Estimate Losses

Specific loss estimation

• utputs: tables, maps,

summary text

Application: Use HAZUS-MH Risk Assessment Outputs

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Hazard Identification and Profiling

• What hazards pose the greatest threat to Chenango County?

–

We want to identify our “hazards of concern” that we will carry through the planning process.

–

Our effort should be proportional to the risk the hazards pose.

–

We are limiting this plan to natural hazards.

• County conducted a Hazards-New York (HAZNY) analysis in November,
• 2004. We will go through this exercise today.
• Hazards are profiled (characterized) according to:

–

Background and local conditions

–

Historic frequency and probability of occurrence

–

Severity

–

Historic losses and impacts

–

Designated hazard areas

• Where do we get this data?

NOAA, NWS, USDA, USACE, FEMA, NYSEMO, Regional, County and Local Agencies

Challenge: Identifying losses at the County and Local level

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Inventory of Assets What is at risk? People, Property, Economy, Environment

Population and Demographics Building Stock (Residential, Commercial, Industrial,

Educational, etc.)

Critical Facilities

– Police, Fire, Emergency Services – Hospitals and Medical Care Facilities – Schools and Care Facilities – Sheltering Facilities – Infrastructure (Transportation Systems, Utilities) – High-Potential Loss Facilities (Dams, Military Installations, Haz-Mats) 1/24/20079

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Risk Assessment – Vulnerability Analysis The Risk Assessment overlays your inventory with your hazards to determine potential losses (vulnerability). Example: Per the State Plan, Chenango County has 1,876 residential properties (10% of total) in the 100-year floodplain, with a structural value estimated at $102

• million. If an average house suffers damage

amounting to 25% of it’s value in a 100-year flood: ($102 Million * 15%)/100 years = $255,000/year

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Developing Mitigation Strategies

Develop Hazard Mitigation Goals and Objectives Goals: General guidelines that state what we want to achieve. Should be consistent with the State goals and other local goals. Example: “Protect existing properties.” Objectives: Define strategies or implementation steps to attain a stated goal. Example: “Enact or enforce regulatory measures that ensure new development will not increase flood threats to existing properties”. Conduct Capability Assessments “Proposed mitigation actions will be evaluated against the backdrop of what is feasible in terms of your government’s legal, administrative, fiscal and technical capacities” (FEMA 386-3)

–

Serve to identify legal authority and administrative, technical and fiscal capabilities in the state, county and jurisdictions that will facilitate or hinder hazard mitigation goals and

• bjectives.

–

State Capability Assessment is in the State HMP

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Identification and Analysis of Mitigation Actions

Mitigation strategies need to be realistic, achievable and action-oriented. Will include both regional (county-wide) strategies, as well as jurisdiction-

specific.

For each proposed mitigation strategy, the following will be identified:

–

Implementation timeline

–

Estimated budget

–

Potential funding sources

–

Lead agency or department

–

Supporting agencies Proposed mitigation activities are evaluated using a Cost-Benefit Analysis or

STAPLEE criteria

Social, Technical, Administrative, Political, Legal, Economic, Environmental

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Other Planning Tasks

Assuring wide involvement and public participation

–

Notices and new releases on planning effort (mass media – Evening Sun, New Berlin Gazette)

–

HMP Webpage detailing effort, providing downloadable drafts of the plan, and providing a way for public input (local contact information and email link)

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Public presentations and meetings

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Public access to draft and final plan documents (incl. libraries, town halls)

–

Questionnaire Documentation of the Planning Process Plan implementation and maintenance procedures Adoption by local governments

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Plan Document

We are proposing the use of a two-volume approach:

Volume 1 will contain all information that applies to the

whole planning area (county) such as description of the planning process, risk assessment, goals and objectives, County/multi-jurisdictional mitigation strategies and a plan maintenance program.

Volume 2 will contain those elements that are “jurisdiction

specific”. Volume 2 would include a jurisdictional annex for each participating local government within each county. These annexes will meet DMA requirements for each jurisdiction.

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Planning Partner Expectations

Attend meetings Provide data and information in a timely manner Facilitate public and stakeholder outreach in your jurisdiction Assist in the development of mitigation goals and objectives Provide past, present and proposed mitigation actions for your

jurisdiction

Author your jurisdictional annex Review and provide feedback on draft plan documents

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General Timeline

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Enough background… let’s get to work!

Hazard Identification Data Collection Update Collaborative Website Jurisdictional Annex - Capability Assessment General Questions, Issues, Concerns 1/24/200718 18

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Hazard Identification Exercise

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Flood (Flash and Riverine)

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Flood (Flash and Riverine)

Definitions:

• HAZNY: When a waterbody overflows its “normal” banks. Flash flood is a sudden

transformation of a small stream into a violent waterway after a heavy rain or rapid snowmelt (modified “and occurs in less than six hours of the onset of the storm”).

• FEMA: A general and temporary condition of partial or complete inundation of

normally dry land areas from (1) the overflow of inland or tidal waters, (2) the unusual and rapid accumulation of runoff or surface waters from any source. (modified in State Plan to include “…a situation in which rainfall is so intense and severe and runoff so rapid that it precludes recording and relating it to stream stages and other information in time to forecast a flood condition.) NFIP Statistics for Chenango County (to 11/30/2006)

–

566 policies insuring $56.9 M property

–

378 claims totaling $4.8 MM

–

3 Repetitive Loss Properties

–

No jurisdictions participating in CRS Per the State Plan, Chenango County has 1,876 residential properties (10% of total) in the 100-year floodplain, with a structural value estimated at $ 102 million. This suggests only 1/3 to ½ have flood insurance.

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Severe Storm (wind, including tornado?)

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Severe Storm (wind, including…?)

Definitions: Severe Storm:

• HAZNY: For this category, you should consider hail storms, windstorms, and

severe thunderstorms.

• FEMA: ??? Guidance documents and website do not define “severe storm”, but

“thunderstorm” on the website states “Other associated dangers of thunderstorms include tornadoes, strong winds, hail, and flash flooding.” Tornado:

• HAZNY: A local atmospheric storm, general of short duration formed by winds

rotating at very high speeds.

• FEMA: A violently rotating column of air extending from a thunderstorm to the

ground. Per the NYS HMP, Chenango County was characterized as being in the top 1/2 of NY counties for susceptibility to the wind hazard. Per NCDC records, 40+ “severe storm” events since 1956, including 4 hurricane/tropical storm events and 11 tornados. Issues and Needs:

• Should we include the following under the Severe Storm (wind) hazard:

hurricane/TS/TD, tornado, hail, lightning?

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Severe Winter Storm (snow)

Definition: HAZNY: A storm system that deposits wintry precipitation, such as snow, sleet or freezing rain, with a significant impact on transportation systems and public safety. The following could meet this definition:

–

Heavy Snow: Six inches in 12 hours or less (mod.: 12” in 12 hours or less).

–

Blizzard: Low temperatures, winds 35 mph or more, and sufficient falling and or blowing snow to reduce visibility to ¼ mile or less for a duration of at least three hours.

• Per the NYS HMP, Chenango County was characterized as not having an

Extreme Snowfall Potential, and has only been affected by one snow

• disaster. The snow threat in Chenango was rated as 9 on a scale of 25.
• NCDC records identify about twenty severe winter storm events.
• NWS reports about one severe winter storm per year affecting the county.

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Ice Storm Definition: HAZNY: Freezing rain that accumulates in a substantial glaze layer of ice resulting in serious disruptions of normal transportation and possible downed power lines. (modified: threshold is 0.5 inches of ice or more).

NCDC identify two Ice Storm events since 1991, with no

deaths or injuries and ~$390K in property losses.

NYS Plan identified Chenango as having one ice storm

related disaster, and placed it in the top half of counties as vulnerable to the

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Ice Jam

Definition: HAZNY: A large accumulation of ice in rivers or streams interrupting the normal flow of water and often leading to flooding conditions and/or damage to structures.

USACE-CRRL identify some 35 ice jam events in

Chenango County.

Landslide

NYS Plan identifies 6 landslide events in Chenango

county.

Wildfire

NCDC identifies 2 wildfire events in Chenango county.

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Hazard Identification – Previous Efforts

November 2004: County conducted a Hazards-New York (HAZNY) analysis

The NYS Plan identified the

following hazards for Planning Area 6 (incl. Chenango):

Hazard Risk Flood High Winter/Ice Storm High Windstorm Moderate Tornado Moderate Wild Fire Moderate

159 DAM FAILURE 172 ICE JAM 176 HAZMAT (IN TRANSIT) 184 HURRICANE 192 SEVERE STORMS 197 TRANS ACCIDENT 202 WILDFIRE 202 DROUGHT 208 UTILITY FAILURE 210 HAZMAT (FIXED SITE) 210 EXPLOSION 212 EPIDEMIC 214 WINTER STORM (SEVERE) 226 EXTREME TEMPS 239 ICE STORM 242 FIRE 250 TORNADO 272 TERRORISM 279 SEVERE STORM 297 FLOOD Rating Hazard

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Data Collection

Hazards Data

• We will continue to improve our compilation of hazard events and losses.
• The greatest challenge is identifying losses at the county and town level.

Inventory Data includes:

• Default data sets from HAZUS-MH (including demographics, building

inventories, and critical facilities) which allow the rapid creation of scenarios (maps & reports) for natural hazard damages

• User-supplied information to refine analysis.

Basic Level analyses use default data sets Advanced Level analyses require collecting and importing more detailed data sets developed at the local level to provide more accurate and enhanced results

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! ! ! ! ! !

BINGHAMTON PSYCHIATRIC CENTER OUR LADY OF LOURDES HOSPITAL UNITED HEALTH/ WILSON HOSPITAL UNITED HEALTH/BINGHAMTON GENERAL

City of Binghamton Union Vestal Town of Binghamton Conklin Dickinson Kirkwood Dickinson

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Hospitals - BC GIS

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Hospitals - HAZUS Floodplains (Q3) 100 Year 500 Year

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Collaborative Website

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Jurisdictional Annex - Capability Assessments

“Proposed mitigation actions will be evaluated against the backdrop

• f what is feasible in terms of your government’s legal,

administrative, fiscal and technical capacities” (FEMA 386-3) Homework: Please complete and return your Capability Assessment worksheets, to: Alison Miskiman Tetra Tech EM, Inc. 100 Enterprise Drive; Suite 400 Rockaway, NJ 07866 Alison.miskiman@ttemi.com

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General Questions, Issues and Concerns